That's believable. Cad is a hard concept for many to grasp. The idea that you are creating a full scale virtual copy, which can be plotted out at reduced scale is not ever grasped by some, particularly those who learned to draw on a board first.
One thing I learned, which I already knew anyway, is that AutoCAD does not make the draftsman. A draftsman can adjust to the machine and be up to speed and then some in a few months, but a computer operator cannot become a draftsman unless he has an undiscovered drafting talent to begin with.